Pedestal-extension-table lock.



PATENTED JULY 21, 1903, E. TYDENI EEDESTAL EXTENSION TABLE Loox. APPLICATION FILED FEB. 19. 1902.

No MODEL.

PATENTED JULY 21., 1903.

No. 734,203. t

EJEYDEN.v PEDESTAL EXTENSION TABLE LOGE.

APPLIOATIIONFILD FEB. 19. 1902.

NO MODEL.

3 SHEETS-SHEET Z.

vl W .W

No. 734,203. v PATENTED JULY 21, 1903.v

E. TYDEN.

PEDESTAL EXTENSION TABLE LOCK.

l APPLICATION FILED FEB. 19. 1902. N0 MODEL. 3 SHEETS-SHEET 3.

" Fig. 6.

Ving devices.

No. l794,209.

Patented July 21, 190e.

PATENT OFFICE.

EMILTYDEN, oF HAsTINes, MICHIGAN.

PEDESTAL-EXTENSION-TABLE LOCK.

SPECIFICATION forming part of Letters-Patent No; 734,203, dated July 21, 1903.

Application iiled February 19. 1902. Serial No. 94,748. (No model.)

To all whom t may concern:

Be it known that I, EMIL TYDEN, a citizen of the United States, and a resident of Hastings, in the county ot Barry, State of Michigan, have invented certain new and useful Improvements in Pedestal-Extension-Table Locks, of which the following is a specication, reference being had to the accompanying drawings, forming apart thereof.

This invention relates to pedestal extensiontables, and has for its purpose the remedying ofa defect generally observed in tables of this class consisting in the tendency of the pedestal to sag at the lower end when the table-top is closed together.

It consists in new and improved means for locking the parts ot' the pedestal together and for unlocking them when the table is to be extended, said means consisting in a vertically-journaled rotatable element and connections b v which itengages and draws together theV two parts of the pedestal at a point substantially below the table-top and means for suitably rotating said element to effect this result.

It consists,'furthermore, in the specific construction set'out in the claims.

In the drawings, Figure 1 is a side elevation, partly sectional, of a pedestal extensiontable having my invention, the section being made in vertical plane through the pedestal and a portion ofthe table-top. Fig. 2 is a detail plan ot operating means, the 'table-top being removed. Fig. 3 is a section at the horizontal plane ot' the line 2 2 on Fig. 1, showing the parts of the pedestal slightly separated ready to be closed up by the lock- Fig. 4 is a similaiview showing the. parts closed up. Fig. 5 is a detail plan of link connection in a modified form. Fig. 6 is a view similar to Fig. 1, showing a modification. Fig. 7 is a view similar to Fig. 5, showing the modilied form presented in Fig. 8 is a section at the line 8 8 on Fig. 7, showing the. pedestal'parts slightly separated and ready to be closed up by the locking,r devices. Fig. 9 is a similar view showing them closed together. Fig. 10 is a viewsimilar to Fig. 4, showing a second modilication. Fig. 1l is a section at the line 9 9 on Fig. 8, showing the pedestal parts closed up by the locking devices. Fig. 12 is a similar view showing them open. Fig. 13 is a sectional view similar to Fig. 12, showing a modification involving a blending ot' the feature of form shown in Figs. 1, 2, and 3 with the form shown in Figs. 10, 11, and 12.

Describing the form shown in the first rgroup of figures, 1 1 are the two parts of the table-top.

2 2 are the pedestal parts pertaining to the two parts 1 1, respectively, of the table-top.

3 3 are the slides to which the bridge 4 is secured, connecting them and carrying the center leg 5which is secured rigidly to the bridge in any customary or convenient manner. An aperture 7, axial with respect to the center leg, is made through the same and through the bridge. A journal-plate 8 is secured above this aperture on the bridge and affords bearing for a shaft 9, which is conveniently made of gas-pipe for lightness and torsional rigidity. The shaft 9 may also have bearing at its lower end in'the bottom ofthe axial aperture in the'cente leg. The latter is. provided with a transaxial aperture 10 near the lower end of the axial aperture, and

a bar 11, which is inserted through the shaft 9 near the lower end ot' the latter and held rigid with it, protrudes at both sides of the latter through said transaxial aperture, constituting lever-arms of the shaft, the trans- .axial aperture being sectoral in extent, so as to allow for certain amount of angular move- `ment of the bar 1l as the shaft 9 may rotate or oscillate about its vertical axis. At the upper end of the shaft 9 it is provided with a lever-handle 12, secured rigidly to it above its bearing in the plate 8, said handle preferably extending oi toward the end of the table, so as to be reached conveniently, although out of' sight under the table-top at the end, when the operator having closed the table up or desiring to extend it has occasion to operate the locking devices.

13 13 are brackets secured Ato the inner faces of the pedestal parts 2 2, respectively, opposite the parting plane. 14 14 are links or lat-ches pivoted to these brackets, respectively, and at their outer swinging ends provided earh with a stud 15, adapted to form a pivot and t0 seat in the angle of the hook 16, with which the ends of the bar 11 are provided. Springs 17 17, secured to the brack- IOO ets 13 and bearing against the links or latches, respectively, operate with a tendency to hold the links in the position shown in Fig. 3, trending from their pivots on the brackets back from the parting plane of the pedestal parts atan angle of about thirty degrees from an imaginary line through the axis of the shaft f) and the pivot of the link on the bracket. The pivot-studs 16 are atadistance from the axis of the shaft 9, such that when they are engaged in the pivot-seats l5 and said links are swung back until the two pivots of each link are in line with the axis of the shaft 9 the pedestal parts will be tight together. If the lever-handle 12 is swung a little farther, carrying the pivot-studs 16 just past the line through the other pivot of the link and the axis of the shaft 9, the reaction of the parts connected and forming the connection will cause them to be locked in that positionthat is, held so that any force tending to separate the pedestal parts will tend to throw the links 14 farther on in the same direction, such further movement being, however, prevented by any convenient stop, as the pivot 19 of the link of the bracket 13. To release the lock and permit the table to be extended, the operator will swing the handle-lever around in the other direction until the pivot-hooks 16 are carried away from the studs15,1eavingthepartsentirelydisengaged.

In the modification shown in Figs. 6, 7, and 8 I substitute for the central shaft 9 a sleeve 20 on the outside of the center leg, having lugs 21 2l extending up on opposite sides ot' the bridge 4 at sufficient distance therefrom to allow proper range of oscillating movement to the sleeve and aording means for attaching the handle-lever 12. At the lower end of the sleeve, which is at a distance below the table-top corresponding to the lower end of the shaft 9 in the original construction, said sleeve has at diametrically opposite positions lugs or brackets 22 22, to which are pivoted links or latches 23 23, trending from their pivots inward toward the axis or at an angle to radii through their pivots of about thirty degrees, the free ends of these links or latches having studs 24 24, corresponding to the studs 15 l5 in the links 14 in the other construction, and on the pedestal parts at positions opposite the parting plane there are brackets 25 25, at the outer ends of which are hooks 26 26, adapted to engage and seatin the pivot-seats 24 24, when the rotation of the sleeve brings said seats around to said studs, and springs 27 27 are provided, operating on the links to hold them normally in the suitable position to cause the pivot-studs to strike the latches, respectively, a little back of or outward from said seats as the sleeve brings them around toward the studs when the pedestal parts are very nearly closed together or so that they will strike directly into the seats if the pedestal parts are a little more separated. The length and angular movement of the links between their normal positions under the control of the springs 27 and their position when swung into radial line are calculated to be such as to take up the necessary amount of sag between the pedestal parts, and the operator will close them up by operating the sleeve by means of the handle 12, as in the other construction, a stop 29 being aorded by the pivot of the link to the lug, the same being arranged to project so as to strike the bracket at the proper point after the moving pivot is carried past the radial line through the other pivot of the link.

A modification of the lirst form is shown in Fig. 5. It consists in using two links 30 and 31, pivoted together, the link 30 being pivoted to the bracket at the outer end of the latter and thelink 3l havinga pivot-stud 32 protruding downwardly into a slot 33 vin the bracket and upwardly for engagement with the hook 35, which terminates the bar 36,which in this form is substituted for the bar 1l in the original form, said hook 35 being angular-that is, comprising a finger juttiug off at right angles thereto from its stem. A light spring 37 may be provided in any convenient position tending to hold the pivot-stud 32 inward, so as to keep the links folded, and when the operator at the proper time operates the lever-handle 12 the hook 35, passing in behind-that is, outside of the stud 32--comes into position to be crowded outward by the latter, which is forced outward when the side or stem of the hook strikes the knee or joint of the two links and presses it inward toward the line, connecting the extreme pivots, and in this action it will be seen the pedestal parts are forced together and that the knee-pivot of the two links being forced past the line connecting their remote pivots the parts become locked, as in the other forms. 'lhe unlocking is eected in this form as in the others by reversing the movement of the handle-lever, the spring 27 operating to fold the links again as soon as the hook is out of the way.

In the form shown in Figs. 10, l1, and l2 I employ links 38 38, pivoted to the pedestal parts at diametrioally opposite positions, as in the other structures, said links, however, being long enough and of suitable shape to reach around the center leg, 'so as to engage the bar 11 at the end opposite the pivot of the link to the pedestal part. This construction has the advantage of not requiring the brackets to which the links are pivoted to extend out far enough to give the links room for swinging back of their pivots and also makes the clamping movement easier, because of the greater distance between the two pivotal engagements of each link. It necessitates, however, provision for diverting the link around the leg as the pedestal parts are moved together, and for this purpose I secure to the bar a ring 39, which encompasses the leg and is provided with the tapering noses 40 40 at proper position to be encountered by the pivot-studs 4l 41, which the links carry at their free ends, so that the links are di- IIO verted laterally and caused to pass by the lug, being drawn in again by springs 43 43 to Vcause the pivot-studs to engage the pivotseats 42 42 in the ends of the bar 11. The clamping or cramping action in this structure when the shaft 9 is oscillated by the handlelever will be understood from the description of the preceding structures. It will be manifest also that the same structure, so far as the relation of the links to the leg is concerned, can be employed with the exterior sleeve instead of the central shaft, which is shown in the form represented in Figs. 6, 7, and 8. Such a construction may be understood, as shown inFig. 13, in which the ring 39 of the last-described construction becomes a flange 44 on the lower end of the sleeve, the bar 1l being dispensed with, of course, the upper structure being identical with the form shown in Figs. 6, 7, and 8, and the construction ofthe links and their operation being the same as in Figs. 10,11, and 12.

I claim- 1. In a pedestal extension-table, in combination with the separable parts, the pedestal parts pertaining thereto, respectively, and' devices when the pedestal parts are near together and before they are entirely closed, said latching devices and the respective engaging devices of the pedestal parts being relatively constructed to draw the pedestal parts together by movement of the latch in one direction after such engagement, and means for giving the latch such movement. 2. In a pedestal extension-table, in combination with'the separable parts and the pedestal parts pertaining thereto respectively; an elementsuitably mounted to be inclosed in the pedestal rotatable about a vertical axis; links for connecting said rotatable element with the pedestal parts respectively1 at a substantial distance below the table-top, each link being pivotally attached to one of the parts which it is to connect, the other part having means for pivotally engaging the link; means for holding thel links normally in position to be thus engaged upon the rotation of the rotatable element when the pedestal parts approach but before they are closed; means for rotating said part to effect the second pivotal connection of the links respectively, the two pivots of each link when the said second connection is eiected before the pedestal is closed being out of line with the axis of the rotatable element, the pivot which is moved in such rotation being at the opposite side of the axis from the other pivot; whereby such rotation crowds the pedestal parts together.

3. In a pedestal extension-table, in combination with the two separable parts and the pedestal parts pertaining thereto respectively; an element supported so as to be inclosed in the pedestal rotatable about a vertical axis; two pairs of links for connecting said rotatable element with the pedestal parts respectively at a substantial distance below the table-top, the two links of each pair being pivoted together, and one of them pivoted to one of the parts to be connected by the pair, the other being guided on the same element in direction substantially radial to the axis of the rotatable element, the

`other of the two connected parts having a projection in the form of an angular hook one arm of which becomes engaged beyond said guided end in the second link of the pair, While the other side or arm encounters the links at their joint or pivot as the rotatable element is rotated before the pedestal parts are closed; and means for rotating said element adapted to continue such rotation until the pedestal parts are drawn together.

4. In a pedestal extension-table, in combi-V nation with the separable parts of the table l tating said element to eect-the second piv- IOO otal connection of the links respectively, the

relative positions of the link-pivots and the points of such engagement being such that said rotation brings them into line with the axis of the rotatable element when the pedestal parts are closed and means for stopping the movement of the links when the moving pivot slightly passes .the radial line through the other pivot; whereby reaction of all the parts concerned in said operation under the tension and compression thus produced holds the pedestal parts locked.

5. In a pedestal extension-table, in combination with the separable parts of the table and the pedestal parts pertaining thereto respectively; an element supported so asto be inclosed in the pedestal rotatable about a vertical axis; links pivoted to the pedestal parts elementafter such engagement draws the piv ots of the links toward such axis and closes thel pedestal parts. 6. In a pedestal extension-table, in combination with the separable parts of the table. and the pedestal parts pertaining thereto re spectively; the center leg and a rotatable element journaled therein protruding from the upper end thereof and extending down to a substantial distance below the table-top, the leg being transaxially apertured at a like distance below the table-top, and the rotatable element having lever-arms extending through said aperture and projecting beyond the leg at both sides; links for connecting said leverarms with the pedestal parts respectively, each link being pivotally attached to one of the parts which it is to connect, theother part having means for pivotally engaging the link; means for holding the links normally in position to be thus engaged upon the rotation of the rotatable element before the pedestal parts are closed; a lever at the upper end of said rotatable element extending under the table-top for rotating said element to eiect the second pivotal connection of the links respectively, the two pivots of each link when the said second connection is eected before the pedestal is closed being out of line with the axis of the rotatable element, the pivot which is moved in such rotation being at the opposite side of the axis from the other pivot; whereby such rotation crowds the pedestal parts together.

7. In a pedestal extension-table, in combination with the two separable parts of the table and the pedestal parts pertaining thereto respectively; an element journaled in the center leg rotatable about a vertical axis, the leg being transaxially apertured at a substantial distance below the table-top and said rotatable element having lever-arms protruding from said aperture; links pivoted to the pedestal and adapted to engage said arms respectively, the point of such engagement of each link being at the opposite side of the pivot of the link from the axis of the rotatable element; and means for rotating said element to draw the pivots of .the links to the pedestal parts toward the axis and close up said parts.

8. In a pedestal extension-table, in combination with the separable parts and the pedestal parts pertaining thereto respectively; an element mounted so as to be inclosed by the pedestal and rotatable about a vertical axis; links for connecting said rotatable element with the pedestal parts respectively at a substantial distance below the table-top, each link being pivoted to the one of the two parts which it is to connect, the other part having means for pivotally engaging it; means for holding the links normally yieldingly in position to be thus engaged upon the rotation of the rotatable element before the pedestal parts are closed, to effect the second pivotal connection of the links, the two pivots of each link when thus connected being out of line with the axis of. the rotatable element, the pivot which is moved in such rotation being at the opposite side of the axis from the other pivot; whereby the rotation in direction to bring the pivots in line forces the pedestal parts together, the parts being adapted for such rotation until the line of the moving pivot passes the line from the axis to the other pivot, and a stop to arrest the movement after the line is passed; and means for rotating said rotatable element at will to and from said stopped position.

9. In a pedestal extension-table, in combination with the separable parts and the pedestal parts pertaining thereto respectively; an element journaled in the center leg and rotatable about a vertical axis, having at the upper end a lever-arm extending horizontally under the table-top for rotating said element through a limited angle; projections from said element at a substantial distance below the ltable-top extending out through the center leg, the latter being apertured for the purpose; links pivoted to the pedestal parts respectively adapted for pivotal engagement at their free ends with said projections respectively as the latter rotate about said vertical axis; springs holding said links yieldingly in position trending from their pivots on the pedestal parts toward the projections which are to engage them respectively in a direction outward from the axis of rotation and oblique to the radius from said axis to the link-pivot; whereby continued rotation of the rotatable part after eecting pivotal engagement with the free end of the links forces the pedestal parts together.

10. In a pedestal extension-table in combination with the separable parts and the pedestal parts pertaining thereto respectively; an element suitably mounted to be inclosed in the pedestal rotatable about a vertical axis, and having at a substantial distance below the table-top horizontally-extending lever-arms; devices on the pedestal parts respectively in position for engagement with said lever-arms as they rotate, said arms and devices being provided with means for such engagement adapted to crowd the parts together as the engagement is perfected by the rotation.

1l. In a pedestal extension-table, in combination with the separable parts and the pedestal parts pertaining thereto respectively; an element suitably mounted to be inclosed in the pedestal rotatable about a vertical axis, and having at a substantial distance below the table-top horizontally-projecting lever-arms; engaging devices for said leverarms on the pedestal parts respectively, one of the parts in each such engagement being hooked, and the other being adapted to be engaged by the hook as the lever-arm rotates, said engaging parts being adapted to crowd the pedestal parts together as the hook completes its engagement.

12. In a pedestal extension-table, in combination with the separable parts and the pedestal parts respectively; a shaft journaled in the center leg and having lever-arms protruding therefrom at a substantial distance below the table-top; devices on the pedestal IOO IIO

parts respectively adapted for engagement with the lever-arms as the shaft rotates, said shaft protruding from the upper end of the In testimony whereof I have hereunto set my hand, in the presence of two Witnesses, ro at Chicago, Illinois, this 12th day of February,

leg, and means connected to it at the upper 1902. end for giving it rotary movement through a limited angle, said means comprising a. handle extending off toward the edge of the table under the table-top.

EMIL TYDEN. In presence of- CHAs. S. BURTON, H. J. ADAMS. 

